6672209 has 4 divisors (see below), whose sum is σ = 6678180. Its totient is φ = 6666240.

The previous prime is 6672191. The next prime is 6672229. The reversal of 6672209 is 9022766.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9022766 = 2 ⋅4511383.

It can be written as a sum of positive squares in 2 ways, for example, as 3330625 + 3341584 = 1825^2 + 1828^2 .

It is a cyclic number.

It is not a de Polignac number, because 6672209 - 2¹² = 6668113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6672229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752 + ... + 3729.

It is an arithmetic number, because the mean of its divisors is an integer number (1669545).

Almost surely, 2^6672209 is an apocalyptic number.

It is an amenable number.

6672209 is a deficient number, since it is larger than the sum of its proper divisors (5971).

6672209 is a wasteful number, since it uses less digits than its factorization.

6672209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5970.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 6672209 is about 2583.0619427339. The cubic root of 6672209 is about 188.2593466833.

The spelling of 6672209 in words is "six million, six hundred seventy-two thousand, two hundred nine".